Safety control for gas stoves



March 4, 1930. c, PEEBLES I 1,749,085

SAFETY CONTROL FOR GAS STOVES Filed June 17, 1927 2 Sheets-Sheet 1 amulet March 4, 1930.

C. PEEBLES SAFETY CONTROL FOR GAS STOVHS Filed June 17, 1927 2 Sheets-Sheet 2 Patented Mar. 4, 1930 UNITED STATES CHARLES rnnnnns, or vonxnns, nnw Yonx SAFETY CONTROL FOR GAS STOVES Application filed June 17,1927. Serial no. 199,501.

This invention relates to improvements in gas stoves and heaters, and has for one obect to provide a means for controlling the v gas cook of a gas stove or a gas heater in sucha manner that children will not be able to readily turn the gas cock, thus avoiding the accidental discharge of gas.

Another'object is to provide such a means whereby, if the burner has been lighted and then accidently put out, the gas cook will be automatically turned so as to shut off the supply of gas to the burner.

Another object is to provide a means whereby, when the gas cock has been opened to supply gas to the burner, said gas cook will be automatically closed after the lapse of a definite time interval. a

With the above and other objects in view, my invention consists in the combination 2 and arrangement of parts hereinafter described and claimed, and more particularly illustrated in the accompanying drawings, wherein 1 i Figure 1 is ,a fragmentary plan view of a gas stove and burner with my invention associated therewith, parts thereof being shown insection.

Figure 2 is a partly sectional side view of Figure 1.

Figure 3 is a front elevation of Figure 1. Fi re 4 is an enlarged view along the line 4-4 of Figure 1, showing the thermostat and heat conveyor, as mounted in the burner. 4

Referring now more particularly to the drawings, a portion of a stove 1 is shown, having the usual supply line 2, gas cock 3 and burner 4. The gas cook comprises 4 a plug 5, and a handle 6. The burner is provided with a central aperture 7, as is usual in such constructions. A crank 8 is mounted rigidly on the lower portion of the plug 5 between the usual nut 9 and spring i 4 10. A housingll is mounted on the stove 1 and extends along side the burner pipe 12. The housing 11 terminates in a triangular shaped extension 13, forthe purpose of housing the thermostat 17 hereinafter described. The saidhousing extension 13 Figure 5 is a modified form of latch bar. Y

has one portion tral aperture"? 0 copper heat collectorv 15 has its lower end mounted on said housing extension 13 and tprojecting under the cenits upper end positioned level with the top of the burner i; the said heat collector 15 also has a flange 16 mounted at its upper end for the purpose of more readilycollecting the radiant heat from the flame of the burner.

A thermostat 17 having a rising stem 18 is also mounted in the housing extension 13, and a heat conductor or conducting bar 19 has one endmounted on said stem 18 and the other end formed with a ring 20 adapted to embrace the heat collector 15. The said heat collector 15 is formed with an enlargement 21 and the said ring 20 slidably engages said enlargement 21 for the purpose of conducting the heat in the heat collector to the thermostat. As the heat is conducted to the ther mostat the stem 18 will rise, thus lifting the ring 20 from engagement with the enlargement 21 on the heat collector 15; by this means the amount of heat conducted to the thermostat is reduced, thus preventing the overloading of thethermostat. Also pivotally mounted on the stem 18 is an A-frame 22. Normally a pin 23 mounted on the thermostat 17 engages one leg of the A-frame 22 so as to throw the A-frame ofi' center, but

as the stem 18;rises, the A-frame disengages the pin 23 so as to permit the A-frame to swing free. I A latch lever 24 is pivotally mounted in lever 24 will be disengaged from the Asframel Apin '23 is mounted on the thermostat so as to prevent the tilting of the A-frame when engaging the latch lever. The other end of the latch lever 24 has a dependent fork 25,

slidably engaging a latch bar 26, said latch bar 26 having a plurality of: notches 27 provided on the upper surface thereof, said the burner 4. A tubular I the housing 11 near the burner end thereof,

i 40 is released so as to 5 24 as heretofore descri e notches being adapted to engage the base of the fork 25. The ends of the ork, as at 28,

engage the inner end of a finger lever 29, pivotally mounted in the housing 11 near 5 the gas cock end thereof; the said finger lever 29 extends longitudinally of the housing 11, and the outer end projects beyond the .end of the housing and substantially beyond the gas cock 3 and terminates in a finger plate 30. The outer end of the finger lever 29 is also placed under an upward tension as by a vertically extending spring 33 connecting said outer end of the finger lever with the housing 11; the said outer end of 15 the fing'er lever is also connected, as by a chain 34 passed over a pulley 35 mounted on the stove 1, to a time clock 36 of usual construction.

The latch bar '26 is slidably mounted in the housing 11 for longitudinal movement therein. The one end .of the latch bar 26 that lies near the burner is tensionally connected to the housing 11 as by a spring 31; the other end of the latch bar ispivotally connected to the crank 8 as by a link 32.

In use, the parts being in the positions shown in full lines in the figures, when it is desired to light the burner, the finger lever 29 is pressed down so as to lift the fork 25 from 30 engagement with the latch bar 26, the gas cock 3 is thenturned so as to admit gas to the burner,-which movement of the gas cock is communicated to the crank 8, link 32 and latch bar 26, thus moving the latch bar 26 in 35 a direction away from the latch lever 24, the

latch lever fork 25 being held from engage-- ment with the notches 27 as by pressure on the finger lever 29; when the gas cockhasbeen opened as far as desired, the finger lever 29 engage one of the notc es 27, thus holdin; the gas cock open against the tension 0 the spring 31.

' As the heat of the flame of the burner is conducted to the the'rmostat by the means release the fork 25 from enga ement with the notch 27, thereby enabling t e spring 31 to close the gas cock 3. The pin 23 prevents the A-frame from tilting off center when I engaging the latch lever 24. When the A- frame has dropped far enough to engage the oo 'pin 23, said pm will cause the frame to tilt ofi' center and disengage the latch lever 24 as heretofore describedilwhere'upon the parts resume the positions own in full lines in the figures.

When it is desired to manuallyclosethegas ermit the fork 25 to.

cock 3, all that is required is to press with the finger on the finger lever 29, which lifts the fork 25 and releases the latch bar 26, so as to close the gas cook in a manner as heretofore described; or the time clock 36 will exert a similar pressure on the finger lever as by the chain 34, the time clock being set in the usual manner.

As the gas cock may only be turned when the finger lever 29 is pressed down so as to release the fork 25 from the latch'26, the gas cannot be turned on gas cock.

In the modified-form of latch bar 26 shown in Figure 5, each of the notches 27 has one of its sides 37 sloping towards the latch lever 24, so that the fork 25 will ride over the notches 27 when the gas cock 3 is opened and the latch bar 26 moved away from the latch lever, but said fork 25 by engaging the other side 38 of said notch will prevent the reverse movement of the latch bar until said fork is lifted out of engagement with the notch, as described. By this construction it is not necessary to depress the finger lever 29 when opening the gas cook 3.

While I have herein described a certain by children handling the specific method of construction and assem- 'bling the elements of my invention, it is un derstood same may be varied in minor details, notdeparting from the spirit of my invention as defined in the appended claims.

I claim: I

1. In combination with a gas burner and a thermostat, a radiant heat collector mounted adjacent to said gas burner and a heat conductor slidably engaging said heat collector and conductivelyconnecting said heat collector with said thermostat.

2. In combination with a gas burner and a thermostat, a radiant heat collector mounted in juxtaposition to said burner, a heat conductor slidably engaging said heat collector and conductivelly connecting said heat col-.

lector with sai hermostat, and means on said collector co-operatively connected with said conductor for regulating the amount of heat conducted to said thermostat.

3. In combination with a gas burner having a gas. supply cock, and a thermostat, a radiant heat collector mounted in juxta osition to a said burner, a heat conductor s idably engaging said heat collector and conductively connecting said heat collector with said thermostat, means on said collector co-operatively connected with said conductor for regulating the amount of heat conductedto said thermostat, means for selectively locking said cock in open position independently of said thermostat, and means operable by said thermostat only by the cooling movement thereof for releasing said cock from said locking 4. In. combination with a gas burner and" a rising stem thermostat, a radiant heat collector mounted on said burner, said heat collector comprising a tube of heat conducting metal,,one end of said tube having a flange and the other end being enlarged for a portion of its length, and a heat conveyor of heat conducting metal having one end slidably engaging said enlarged portion of said tube, and the other end conductively connected to said rising stem of said thermostat, whereby when said stem rises said heat conveyor will be disengaged from said enlarged portion of said tube.

' 5. In combination with a gas burner having a gas cock, and a thermostat having a rising stem, a radiant heat collector mounted on said burner, said heat collector comprising a tube of heat conducting metal, one end of bar interposed between the spring and the cock, a latch lever releasably engaging the latch bar, an A-frame pivotally mounted and movable relative to said latch bar and operable by said thermostat, one leg of said A-frame being adapted to releasably engage said latch bar, and means mounted on the thermostat and engaging the other leg of the frame for permitting the engagement of said frame with said latch bar only subsequent to the conduction of heat to the thermostat.

In testimony whereof I afiix my signature.

CHARLES PEEBLES.

said tube having a flange and the other end i being enlarged for a portion of its length, a heat conductor of heat conducting metal having one end slidably engaging said enlarged portion of said tube, and the other end conductively connected to said rising stem of said thermostat, means operably connected with said gas cook for selectively locking the same in opened position, and means for releasin said cock from locked position adapted to e placed in operative relationship to said locking means only when said stem rises, and adapted to operably engage said locking means when said stem falls.

6. In combination with a gas burner having a gas cook, and a thermostat, a device of the kind described, comprising a housing, a latch bar mounted for slidable movement in said housing, said latch bar being operatively connected to saidgas cock, means for normally urging the gas cock to closed position, a latch lever co-operating with said latch bar for selectively locking said cock in open position, a frame pivoted on said thermostat normally disengaged from said latch lever but adapted to be operatively engaged therewith only subsequent to the conduction of heat to the thermostat, and manually operable means engaging said latch lever independently of said frame.

7. In combination with a gas burner having a gas cook, and a thermostat, a device of the-kind described, comprising a spring normally urging said cock to closed position, a latch bar interposed between the spring and the cook, a latch lever releasably engaging the latch bar, an A-frame pivoted to the stem of the thermostat adapted to have one leg thereof engage said latch lever for releasing the same from the latch bar, and means mounted on the thermostat and engaging the 66 other leg of the A-frame for normally preventing the engagement of said frame with said latch lever.

8. In combination with a gas burner having a gas cock, a device of the kind described, comprismg a thermostat, a spring normal] urging said cock to closed position, a la 

